When I was about 3 or 4, I used to get "I" and "you" the wrong way round. I would say "you" when I meant myself and "I" when I meant someone else. I was using the logic that other people referred to me as "you" and to themselves as "I", so therefore I should refer to myself as "you" and to them as "I". For example, at the dinner table I would say to my Mum "You want some of mine" when I meant "I want some of yours".
A childhood belief about speaking

others believed things like this
- i used to believe that sex meant love and that having sex meant the two people would live happily ever after.— amy
- I used to think that "cross-eyed" meant that people had X's for eyes, like dead people in cartoons.— Tim
- I used to believe that when people eloped that meant they were making babies...Anon
- I used to believe that the yellow sky during a sunset meant that people were peeing a lot.Anon
- I used to believe that the red dot on Indian people's foreheads meant that they had psychic powers.— Mark
- I used to believe that when people talked about 4x4 trucks, I thought it meant all the wheels turned.
— tracy